DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Additional Pictures
| Close-up view
of the 3807 Keyboard Device from the PPS 25 Programmable Processor System used with the Cybernetic Systems Mathiputer
(Model CPD-35) manufactured in October 1975. PMOS Technology, 40-pin Ceramic Package. 32 Keys to 5-bits including debounce control and two-key rollover functionality.   |
Package of the 3807 with its lid removed, exposing the wire bonding.
Package Pin 1 in upper-left quadrant. Image resolution: 4,800 DPI (190 pixel/mm). Photo
courtesy of Sean Riddle |
Die of the
3807. Bond pad 1 in upper-left quadrant. Image resolution: 19,200 DPI (760 pixel/mm). Photo courtesy of
Sean Riddle |
If you have additions to the above article please email: joerg@datamath.org.
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